🏷️ Basic Information

Make:

Harley-Davidson

Model:

Dyna FX Models

Year:

2008

Product Name:

Harley Davidson Dyna FX Models Motorcycle Complete Workshop Service Repair Manual 2008

Vehicle Platform Code:

FX

👋 Introduction

Target Audience:

Harley-Davidson Dyna FX owners and independent repair shops specializing in Harley-Davidson motorcycles.

Value Proposition:

Provides comprehensive and authoritative information to maintain, diagnose, and repair 2008 Harley-Davidson Dyna FX models, saving time and money compared to dealership service.

Alternative Resources:

Dealership service, unofficial forums, individual repair guides. This manual offers a consolidated, official-level resource.

Completeness:

Covers virtually every aspect of the motorcycle's mechanical and electrical systems.

Accuracy:

Based on factory specifications and procedures.

User Friendliness:

Organized logically with clear language and diagrams for ease of use.

📋 Manual Details

Manual Type:

Workshop Service Repair Manual

Language:

English

Format:

Downloadable (likely PDF)

Page Count Estimated:

Refer to actual manual for exact count (typically 500+ pages for comprehensive Harley manuals)

📖 Manual Coverage

Engine Overhaul:

Complete engine disassembly, inspection, repair, and reassembly procedures for Twin Cam 96 engines and their variants.

Transmission Service:

Diagnosis, repair, and rebuilding of the 6-speed Cruise Drive transmission.

Fuel System Diagnosis:

EFI system diagnostics, fuel injector service, fuel pump testing, and throttle body inspection.

Electrical System Troubleshooting:

Wiring diagrams, component testing, diagnostic procedures for ignition, lighting, charging system, and accessories.

Braking System Maintenance:

Front and rear brake system servicing, including caliper replacement, pad inspection, fluid bleeding, and ABS troubleshooting (if applicable).

Suspension Adjustment:

Front fork (e.g., 49mm) and rear shock absorber service, adjustment, and replacement.

Chassis And Frame Repair:

Frame inspection, alignment checks, and repair procedures.

Wheel And Tire Service:

Wheel bearing inspection and replacement, tire mounting and balancing, and spoke inspection.

Exhaust System Maintenance:

Exhaust component inspection, gasket replacement, and noise reduction measures.

Bodywork And Trim Care:

Fender, tank, and fairing removal, installation, and minor repair guidelines.

Preventative Maintenance:

Detailed schedules and procedures for oil changes, filter replacements, lubrication, and inspections.

Troubleshooting Guides:

Systematic diagnostic trees and symptom-based troubleshooting for common and uncommon issues.

Component Rebuilds:

Step-by-step instructions for rebuilding engine components, transmission, and brake calipers.

Electrical Diagnostics:

Procedures for testing sensors, actuators, ECUs, and wiring harnesses using multimeter and oscilloscope.

Special Tool Requirements:

Identification and usage instructions for Harley-Davidson specific tools required for various repairs.

Torque Specifications:

Precise torque values for all critical fasteners across the motorcycle.

Wiring Diagrams:

Comprehensive and color-coded wiring diagrams for all electrical circuits.

Fluid Capacities And Types:

Exact fluid requirements, capacities, and recommended specifications for all systems.

Level Of Detail:

Comprehensive, from basic maintenance to complete engine and transmission rebuilds. Suitable for professional mechanics and advanced DIY enthusiasts.

Diagnostic Capabilities:

Advanced diagnostic procedures for EFI systems, including sensor data interpretation and fault code retrieval.

Component Specifications:

Detailed specifications for all major components, including tolerances, clearances, and wear limits.

📊 Manual Specifications

File Type:

PDF (Portable Document Format) - standard for downloadable manuals.

Searchability:

Likely text-searchable for quick access to specific topics.

Printability:

Designed for printing specific sections or the entire manual.

Image Resolution:

High-resolution images and diagrams for clarity.

Binding Type:

N/A (Digital download; print-on-demand services may offer binding)

Paper Type:

N/A (Digital download; for printed versions, high-quality paper is recommended for durability)

⚙️ Engine Specifications

Engine Type:

Harley-Davidson Twin Cam 96

Engine Configuration:

Air-cooled, 45-degree V-twin

Displacement:

96 cubic inches (1584 cc)

Bore X Stroke:

3.75 in. x 4.38 in. (95.25 mm x 111.25 mm) - Standard for Twin Cam 96

Compression Ratio:

8.8:1 (typical for Twin Cam 96)

Horsepower Estimated:

Approx. 70-75 HP (variations by model and tuning)

Torque Estimated:

Approx. 85-90 ft-lbs @ 3000 RPM (variations by model and tuning)

Fuel Delivery:

Electronic Sequential Port Fuel Injection (ESPFI)

Fuel Type:

Unleaded gasoline, 91 octane (R+M)/2 minimum recommended

Ignition System:

High-performance, electronic ignition

🔧 Transmission

Transmission Type:

6-speed Cruise Drive

Clutch Type:

Clutched, constant mesh, multi-plate, wet

Optional Transmission:

N/A for stock 2008 Dyna FX models; aftermarket options exist.

Gear Ratios:

Specific ratios for 1st through 6th gear will be detailed in the manual. Typical 6th gear is an overdrive.

Transmission Fluid:

Harley-Davidson Formula+ Transmission Fluid (or equivalent meeting specifications) for primary drive and transmission.

📐 Dimensions

Length Overall:

Varies by specific FX model (e.g., Super Glide, Street Bob, Fat Bob), consult manual for precise measurements.

Wheelbase:

Varies by specific FX model, typically around 63-64 inches.

Ground Clearance:

Varies by specific FX model, typically around 4.5-5.5 inches.

Dry Weight:

Varies by specific FX model, typically around 550-650 lbs.

Gross Vehicle Weight Rating:

Will be specified in manual for each model variant.

🛡️ Safety Features

Safety Certifications:

Meets applicable DOT and NHTSA standards for motorcycles of its era.

Braking System:

Hydraulic disc brakes front and rear. Some models may have ABS, which will be detailed.

Lighting:

Halogen headlamp, incandescent tail and turn signals. Manual covers proper function and replacement.

Frame Construction:

Steel frame and swingarm providing structural integrity.

💡 Technology Features

Audio System:

Base models typically did not have integrated audio. Some higher-trim Dyna models might have offered dealer-installed or factory-optional audio systems. Manual covers basic electrical for any installed systems.

ABS Availability:

ABS was an optional feature on some 2008 Dyna models. The manual will detail its operation and diagnostics if equipped.

Cruise Control:

Cruise control was not standard on all 2008 Dyna models, but was available as an option. Manual covers its function if equipped.

🔧 Maintenance

First Service:

Typically at 1,000 miles (oil change, filter replacement, primary chain adjustment, inspection).

Subsequent Services:

Scheduled maintenance every 5,000 miles or annually, covering fluid changes, filter replacements, lubrication, and inspections. The manual provides a detailed schedule.

Engine Oil:

Harley-Davidson 20W-50 SYN3 or equivalent meeting H-D specifications.

Primary Chain Case Fluid:

Harley-Davidson Formula+ or equivalent.

Transmission Fluid:

Harley-Davidson Formula+ or equivalent.

Brake Fluid:

DOT 4, Harley-Davidson Premium Motorcycle Brake Fluid or equivalent.

Cam Chain Tensioner Wear:

Early Twin Cam models (prior to hydraulic tensioners) could experience wear on the spring-loaded tensioners, requiring inspection and potential replacement.

Crankcase Cracks:

Certain Twin Cam engines were susceptible to crankcase cracks, particularly around the lifter blocks. The manual will likely have inspection points.

Primary Drive Seal Leaks:

Occasional leaks from the primary drive seal can occur and are covered in the manual.

📚 Vehicle History

Heritage:

Harley-Davidson, founded in 1903, is an iconic American motorcycle manufacturer renowned for its V-twin engines and distinct styling.

Dyna Lineage:

The Dyna line, introduced in 1991, featured a rubber-mounted engine for reduced vibration, offering a blend of classic Harley styling with more modern handling characteristics compared to the traditional big twins. The FX designation historically encompasses a range of Dyna models.

Twin Cam Introduction:

The Twin Cam engine, introduced in 1999, became the powerplant for Harley-Davidson's major model lines, including the Dyna, offering improved performance and reliability over its predecessor, the Evolution engine.

Manufacturing Location:

Assembled in the USA, with components sourced globally.

Production Years:

The Dyna FX models were produced from 1991 until they were phased out and replaced by the Softail platform in 2018.

🏆 Awards & Recognition

Motorcycle Magazine Reviews:

The Dyna platform generally received positive reviews for its balance of performance, handling, and classic styling. Specific awards for the 2008 models would be found in contemporary motorcycle press.

Owner Satisfaction:

Harley-Davidson motorcycles consistently rank high in owner satisfaction, reflecting brand loyalty and the emotional connection riders have with the marque.